In concluding this part of our investigation, we would very briefly remark, that the existence of this principle in connection with the cultivation of the mind, accounts in a very satisfactory manner for the beneficial results which usually accompany the study of languages, mathematics, and some other branches of education similar in their nature.--These objects of study, when once acquired, may never afterwards be used, and will consequently be lost; but in learning them the pupil was compelled to think,--to exercise his own mind on the subjects taught,--to reflect, and to reiterate the ideas communicated to him, till they had been fully mastered. The mental vigour which was at first forced upon the pupil, by these beneficial exercises, remains with him, and is exercised upon other objects, as they are presented to his observation in ordinary life.--The mind in commencing these studies gradually emancipates itself from the mechanical tendencies which an improper system of teaching had previously formed, and now gathers strength daily by this natural mode of exercising its powers. It is the effects of this kind of discipline that constitute the chief element of a cultivated mind. In this principally consists the difference between a man of "liberal education," and others who have been less highly favoured.--His superiority does not lie in his ability to read Latin and Greek,--for these attainments may long ago have been forgotten and lost;--but in the state of his mind, and the superior cultivation of the mental powers.--He possesses a clearness, a vigour, and a grasp of mind above others, which enable him at a glance to comprehend a statement;--to judge of its accuracy;--and, without effort, to arrange and communicate his ideas concerning it. This ability, as we have seen, can be acquired only by active mental exercise, and is not necessarily the result of extensive reading, nor is it always accompanied by extensive knowledge. It is the natural and the necessary product of mental discipline, through which the above described act of "reiteration," like a golden thread, runs from beginning to end. It is the fire of intellect, kindled at first perhaps by classical, and mathematical studies; but which now, collecting force and fuel from every circumstance of life, glows and shines, long after the materials which first excited the flame have disappeared.